p.info{
    /*position:relative;*/ /*this is the key*/
    /*z-index:24; background-color:#ccc;*/
    /*color:#000;*/
    /*text-decoration:none*/}

p.info:hover{z-index:25; /*background-color:#ff0*/}

p.info span{display: none}

p.info:hover span{ /*the span will display just on :hover state*/
    display:block;
    /*position:absolute*/;
    top:2em; left:2em; width:15em;
    border:1px solid #0cf;
    background-color:#cff; color:#000;
    text-align: center}
